Posted: 10/05/2014 at 19:46
A friend....I'm always called upon to do her garden (5 plus acres).....wanted her lovage moved. It was a massive clump so I simply dug it up, cut it in half and replanted one piece and the other was claimed by someone else. After 4 years or so iI is again a large clump. However, it was done in the autumn.
I think you can take root divisions even now but I would cut a generous piece from it. Not sure it is a pot plant though.
Sorry, cannot advise re tree peony. Not something I grow.